When planning my bachelorette party* I wanted an activity that would be fun for my 20 something friends but also ok for my 15 year old cousin. My Bachelorette party theme was a PJ Party. More will be posted about that soon. But one of the main activities of the night that everyone got to decorate a wine glass.
What you need: 
Wine Glass- $1 each from the dollar tree (and they had giant glasses)
Sharpie Paint Pens– These can be kind of expensive, you can find them on amazon but I waited until I got 50% off coupons from all of the different craft stores, went to each one and bought a set at each store. All in all I probably spent $15 on the sharpie paint pens. It would have been a lot easier just to have ordered them on Amazon…
All you need to do is get the girls together put the pens out in front of them and let them decorate! It’s so much cleaner than using paint and paintbrushes. Just remind your guests not to put them through the dishwasher. Some of the ladies even started drinking out of them that night!
* THIS DOES NOT NEED TO BE A BACHELORETTE ACTIVITY IT CAN BE DONE ANY TIME YOU HAVE GUESTS COMING OVER!